memremap: remove the data field in struct dev_pagemap

struct dev_pagemap is always embedded into a containing structure, so
there is no need to an additional private data field.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jason Gunthorpe <jgg@mellanox.com>
Reviewed-by: Dan Williams <dan.j.williams@intel.com>
Tested-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

1 files changed, 5 insertions, 4 deletions

diff --git a/mm/hmm.c b/mm/hmm.c
index 96633ee066d8..36e25cdbdac1 100644
--- a/mm/hmm.c
+++ b/mm/hmm.c
@@ -1368,15 +1368,17 @@ static void hmm_devmem_ref_kill(struct dev_pagemap *pgmap)
 
 static vm_fault_t hmm_devmem_migrate_to_ram(struct vm_fault *vmf)
 {
-	struct hmm_devmem *devmem = vmf->page->pgmap->data;
+	struct hmm_devmem *devmem =
+		container_of(vmf->page->pgmap, struct hmm_devmem, pagemap);
 
 	return devmem->ops->fault(devmem, vmf->vma, vmf->address, vmf->page,
 			vmf->flags, vmf->pmd);
 }
 
-static void hmm_devmem_free(struct page *page, void *data)
+static void hmm_devmem_free(struct page *page)
 {
-	struct hmm_devmem *devmem = data;
+	struct hmm_devmem *devmem =
+		container_of(page->pgmap, struct hmm_devmem, pagemap);
 
 	devmem->ops->free(devmem, page);
 }
@@ -1442,7 +1444,6 @@ struct hmm_devmem *hmm_devmem_add(const struct hmm_devmem_ops *ops,
 	devmem->pagemap.ops = &hmm_pagemap_ops;
 	devmem->pagemap.altmap_valid = false;
 	devmem->pagemap.ref = &devmem->ref;
-	devmem->pagemap.data = devmem;
 
 	result = devm_memremap_pages(devmem->device, &devmem->pagemap);
 	if (IS_ERR(result))